MCLEAN, VA--(Marketwired - May 17, 2016) - Freddie Mac (OTCQB: FMCC) announced today that it auctioned a $500 million reopening of its 1.125% three-year USD Reference Notes® security that matures on April 15, 2019. The stop yield for the issue, CUSIP 3137EADZ9, was 1.025%, priced at 100.285. The bid-to-cover ratio was 3.8 to 1.